Perhaps about a third of the people I knew from MIT graduated with an uncredited minor in the art of pen spinning. Learned and perfected during monstrous lectures and then performed without much thought in smaller recitations, tutorials, and study sessions, the 360 degree spin was legendary. Some started with their mechanical pencils, others with their white clicky erasers. Only the truly bored became ambidextrous. In the same vein (not recommended for class): ZippoTricks.com. (via antenna)